syms x a;
f=x*exp(x)/(1+x)^2;
F=int(f,0,1);
F_simplified=simplify(F);
disp(F_simplified);
fplot(f, [0, 5]); 
hold on;
fplot(F, [0, 5]); 
% 设置坐标轴标签
xlabel('x');
ylabel('y');
